Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0daa49599178f7b…

MALICIOUS

PDF

73.3 KB Created: 2020-12-25 02:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3303d77a9863a405b0e6228f65dba6d2 SHA-1: e9a79e21c5896b011be68b5207a4efab807590ba SHA-256: d0daa49599178f7b710185575a4363bc7ceff5ccf5322e76333ebcd75466111a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'traffmen.ru'. Heuristics indicate a link farm and a malicious redirector, suggesting the document's primary purpose is to drive traffic to malicious infrastructure. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=persuasive+essay+examples+5th+grade+pdf
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/5795782.pdf
    • https://cdn-cms.f-static.net/uploads/4461777/normal_5fd8fb91f33ee.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fa7d104a43c0.pdf
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/5780897.pdf
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fe4f8043c7cb.pdf
    • https://static.s123-cdn-static.com/uploads/4504568/normal_5fc832aa52cc5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rovikibixu/54670596327.pdf
    • https://s3.amazonaws.com/vavejijitatofu/root_mean_square_deviation_in_bioinformatics.pdf
    • https://s3.amazonaws.com/mutirexa/all_tailed_beast_strongest_to_weakest.pdf
    • https://s3.amazonaws.com/zunaduxa/sepulederizogarago.pdf
    • https://s3.amazonaws.com/rovuweraja/dinuwubijuvafuva.pdf
    • https://s3.amazonaws.com/rozebofukixus/sulapanogasotulo.pdf
    • https://s3.amazonaws.com/kudowo/daphnia_water_flea_facts.pdf
    • https://s3.amazonaws.com/xukonakefules/destilacin_por_arrastre_de_vapor_fundamento.pdf
    • https://s3.amazonaws.com/vezosoluvezoj/chapter_4_forensic_science_test_answers.pdf
    • https://s3.amazonaws.com/degisapemifa/hopkins_elementary_school_calendar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e017.bin
4e61eea6c67d639f9acae0ffe4fee1aa163c9a74c3547f495c959fb7b6ad029a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 5812 bytes
font_01_sfnt_off0000f3cd.bin
e86b437dcf584d784eddbe2318972649bc3dc217acdc926f0dace174c696e865		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 10800 bytes

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